Prior to the elimination of Selective Availability for GPS signals in 2000, the use of GPS tracking for GPR surveys, without the use of costly RTK-DGPS equipment, was essentially impossible due to the large uncertainty in position solutions. As GPS and now multi-constellation GNSS receivers have plummeted in price and complexity, combining GPS and geophysical sensors has become commonplace. Some GPR systems now include integrated GNSS receivers.
[click below to continue reading]